Green sulfur dye.



- UNITED STATES PATENT ornion JOSEPH. FLACHSLAENIDER, 0F ELBERFELD, GERMANY, .ASSIGNOR- T0 FABBENTFABRI- KEN VORM. FRIEDR. BAYER & 00,01 ELBERFELD, GERMANY, A CORPORATION OF GREEN SULFUR DYE.

No Drawing.

To all whom it may concern: I

Be it known that I, J USEPH FLAOHSLAEN- DER, doctor of philosophy, chemist, citizen of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in Green Sulfur Dye, of which in which the amino group is substituted by at least one alkyl group, the other substituent beingH, alkyl or aryl, and X the radical of a simple or substituted phenol or their leuco compounds produced byjoint oxidation of monoor dialkyl-l-naphthylamins, (such as monoor dimethylor diethylnaphthylamin) and para-aminophenol (or its substitution products, *such as para-amino-- ish coloration. They are distinguished, by

their good solubility and they produce pure green shades fast to boiling.

in order to illustrate the new process more fully the following example is given, the

Specification of Letters Patent. Patented O t 13 13114. Application filed August 9, 1911. Serial No. 643,190.

parts being by weight:34:.7 parts of the leucoindophenol having the following formula:

obtained from "monoethyl-1-naphthylamin and 2.6-dichloro-4-ai'nino-l-phenol are added to a solution of 32 parts of sulfur and 136 parts of crystalline sodium sulfid and after the addition of 7 parts of (11180, the mixture is heated to about 105 C. until the parent material has disappeared. The melt can be directly dried or subjected to purification, The dyestuif thus obtained contains copper and is after being dried and pulverized a black powder soluble in a sodium sulfid solution with a green colorationQ It is soluble in concentrated sulfuric acid and in hot caustic soda lye (30 B.) with a greenish-blue coloration and dyes cotton in pure green shades. The above mentioned quantities of sodium sulfid and of sulfur as well as the temperature and the duration of the reaction can be varied Within wide limits. Similar dyestuffs are obtained by using other of the above mentioned leuco compounds.

1. The hereinbefore described new sulfur dyes obtained from leucoindophenols, containing the nucleus:

in it in which the amino group is substituted by at least one alkyl group, and in which X rep resents a phenolic radical which contain copper and are after being dried and pulverized black powders being soluble in a solution of sodium sulfid generally with a green coloration being soluble in concentrated sulfuric acid generally with a bluish coloration; and dyeing uninordanted cotton green shades, substantially as described.

2. The hereinbefore described new sulfur dyes obtained from leucoindophenols con taining the nucleus,

in which the amino group is a lnono-alkyl substituted amino group, and X represents a phenolic radical, which are after being dried and pulverized black powders being soluble in a solution of sodium sulfid generally with a green coloration being soluble in concentratedsulfuric acid generally with a A bluish coloration; and dyeing uninordanted cotton green shades, substantially as described.

3. The hereinbefore described new sulfur dye obtained from leucoindophenol of the formula:

Nil-Call; 

